种植某种树苗,成活率为0.9.利用计算机或计算器产生0到9之间取整数值的随机数,每5个随机数为一组,随机数0表示不成活,其它随机数表示成活.现产生30组随机数:69801,66097,77124,22961,74235,31516,29747,24945,57558,65258,74130,23224,37445,44344,33315,27120,21782,58555,61017,45241,44134,92201,70362,83005,94976,56173,34783,16624,30344,01117.通过随机模拟试验,可粗略地估计种植这种树苗5棵,恰好成活4棵的概率是?
问题描述：
种植某种树苗,成活率为0.9.利用计算机或计算器产生0到9之间取整数值的随机数,每5个随机数为一组,随机数0表示不成活,其它随机数表示成活.现产生30组随机数:
69801,66097,77124,22961,74235,31516,29747,24945,57558,65258,74130,23224,37445,44344,33315,27120,21782,58555,61017,45241,44134,92201,70362,83005,94976,56173,34783,16624,30344,01117.通过随机模拟试验,可粗略地估计种植这种树苗5棵,恰好成活4棵的概率是?
答
包含1个“0”的数有9组.
事件概率=9/30=0.3